JP2013205666A - Color filter formation substrate and display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a color filter formation substrate, in a display device such as mobile electronic equipment of a configuration obtained by using a color filter formation substrate arranging a black frame part having a shading property for forming a non-display area around a circumference of a display area, without using a cover glass, and arranging a substrate side thereof on an outermost side (observer side) to form the non-display area, the color filter formation substrate capable of maintaining tightness of a black color under indoor light and also under sunlight, and capable of bestowing a product an impression of high-class.SOLUTION: A color filter formation substrate used for a display device employs a transparent substrate as a base material, and on one surface side of the base material, pigmented layers of various colors for a color filter are arranged in a display area to form the display area. A frame part having a shading property is formed outside of the display area. The substrate side is arranged on an outermost side (observer side). In a frame part formation layer included in the frame part, a side making contact with the base material is a resin layer obtained by dissolving the dye as a coloring material.

Description

  The present invention relates to a color filter forming substrate for a display device and a display device, and in particular, with a transparent substrate as a base material, on one surface side of the base material, a colored layer for each color filter is disposed in a display region. A color filter forming substrate in which a display region is formed, and a light-shielding frame portion (also referred to as a light shielding portion) is formed outside the display region, and the substrate side of the color filter forming substrate is the outermost side ( The present invention relates to a color filter forming substrate used in a display device that becomes an observer side.

In recent years, display devices such as liquid crystal display devices have been widely used as flat display panels, while the spread of display devices is remarkable.
For example, a liquid crystal display device generally includes a color filter forming substrate in which a black matrix layer composed of a light-shielding colored layer and a colored layer of each color are disposed on one surface of a transparent substrate, and a counter electrode substrate (also referred to as a TFT substrate). With a predetermined gap, and a structure in which the liquid crystal is sealed in the gap, and the light transmittance of the pixels of the colored layer of each color is controlled electrically by controlling the orientation of the liquid crystal As a result, a color image is displayed.
In particular, mobile notebook PCs and multifunction terminal devices (also called high-function terminal devices) have recently become widespread, and tablet-type multifunction terminal devices are expected to spread rapidly. However, display devices of these terminal devices (hereinafter referred to as mobile electronic devices) are required to have better design in addition to high display quality.
In mobile electronic devices that have recently become popular, efforts have been made to achieve high added value, such as high definition, energy saving, and miniaturization (lightening).

Conventionally, as a display device for these mobile electronic devices, a light-shielding black frame for forming a non-display area over the entire periphery of the display area is formed on one side of a transparent substrate as a base material. There is a form in which the non-display area is formed by using the provided cover glass and the base material side is arranged on the outermost side (observer side). In response to the demand for weight reduction of these mobile electronic devices, Without using a cover glass, a transparent substrate is used as a base material, and a colored layer of each color for a color filter is arranged on the display area on the one side, and the non-display area is arranged over the entire periphery of the display area. There is also a form in which a non-display area is formed by using a color filter forming substrate having a black frame portion having a light-shielding property and forming the base material side on the outermost side (observer side).
In the case of a display device for a mobile electronic device that does not use a cover glass, for example, when a simplified cross-sectional configuration is shown, as shown in FIG. The color filter forming substrate 110 and the TFT substrate 150 in this order.
Further, in the case of a display device for a mobile electronic device using a cover glass, when a simplified cross-sectional configuration is shown, as shown in FIG. 130, the color filter forming substrate 110, and the TFT substrate 150 in this order.
Further, in the case of a display device for an in-cell touch panel type mobile electronic device that does not use a cover glass, for example, when a simplified cross-sectional configuration is shown, as shown in FIG. The base material side 111 of the TFT substrate 150 and the TFT substrate 150 are arranged in this order, with the color filter forming substrate 110 and the touch panel 140 integrated.
On the other hand, in the case of a display device of a touch panel type mobile electronic device using a cover glass, as shown in a simplified cross-sectional configuration, the cover glass is on the outside (observer side) as shown in FIG. The cover glass 130 and the touch panel 140 are integrated, and the color filter forming substrate 110 and the TFT substrate 150 are arranged in this order.
8A, FIG. 8B, FIG. 9A, and FIG. 9B are simplified and show only the positional relationship between the above-described parts.

And the color filter formation board | substrate used for the display apparatus of the mobile electronic device shown to Fig.8 (a) and FIG.9 (a) which does not use a cover glass has the form as shown in FIG. 10 normally.
10A is a plan view of the color filter forming substrate, and FIGS. 10B and 10C are directions of arrows in E1-E2 and E3-E4 of FIG. 10A, respectively. FIG. 10 (d) is an enlarged view of a portion E5 in FIG. 10 (a).
In general, the colored layers for the color filters, the black matrix colored layer, and the frame colored layer are formed by a photolithography process using a photosensitive resin material in which a pigment is dispersed. In addition, a predetermined colored layer is similarly formed on the light-shielding frame portion 112 as a non-display region over the entire periphery of the display region by a photolithography process.
In some cases, the frame portion 112 is formed by a printing method using a resin material in which a pigment is dispersed.

The use of such mobile electronic devices is not limited to indoors but is also frequently used outdoors, so that the visibility of displayed images in the sunlight (contrast improvement) has been improved.
However, little improvement has been made in terms of the design of the frame.
In any form of mobile electronic device display device, the black shading of the light-shielding frame is not good, indoors, outdoors, indoors, and under sunlight. In some cases, the frame portion may appear whitish, and it is difficult to finish a high-quality product in terms of design, which is a problem.

WO2010-150668 gazette JP 2009-053893 A

As mentioned above, recently, mobile notebook PCs and multifunction terminal devices (also called high-function terminal devices) have become popular, and tablet-type multifunction terminal devices have rapidly spread. Although liquid crystal display devices are used as display devices for these mobile electronic devices, better design is required in addition to high display quality.
Under such circumstances, in mobile electronic devices, as shown in FIGS. 8 (a) and 9 (a), without using a cover glass, a transparent substrate is used as a base material for each color filter color. Using a color filter forming substrate in which a colored layer is arranged in a display region and a light-shielding black frame portion is arranged to form a non-display region over the entire periphery of the display region. In the case where the non-display area is formed with the side located on the outermost side (observer side), the non-display area is formed over the entire periphery of the outer periphery of the display area under indoor, outdoor, and sunlight. The black color of the shading black frame is not good, especially when outdoors, because the frame may look whitish due to the influence of sunlight. There was a need for this.
This invention respond | corresponds, arrange | positions the colored layer of each color for color filters in the area | region for display on the one surface side by using a transparent substrate as a base material without using a cover glass, and for this display To form a non-display area around the entire periphery of the area, a color filter forming substrate with a black frame part with a light-shielding property is used, and the base material side is arranged on the outermost side (observer side) and is not displayed. In the display device of the mobile electronic device in the form of forming the region, especially in the outdoors, the color filter formation that can suppress the frame portion from appearing whitish due to the influence of sunlight and give the product a high-class feeling It is intended to provide a board.
At the same time, using such a color filter forming substrate, a display device for a mobile electronic device in which a non-display area is formed by arranging the base side of the color filter forming substrate on the outermost side (observer side) will be provided. It is what.

The color filter forming substrate of the present invention uses a transparent substrate as a base material, and on one surface side of the base material, a colored layer for each color filter is arranged on the display region to form a display region. A frame part forming layer for forming a frame part, which is a color filter forming substrate used in a display device, wherein a light-shielding frame part is formed outside the region, and the base material side is the outermost side (observer side). Is characterized in that the side in contact with the base material is a resin layer in which a dye is dissolved as a coloring material.
And said color filter formation board | substrate, Comprising: As for the said frame part formation layer, the resin layer which dissolved the dye as a coloring material is used as the side which contacts the said base material as the resin layer which dissolved the dye as a coloring material, And a resin layer in which a pigment is dispersed as a coloring material, and the frame portion forming layer includes a resin layer in which a dye is dissolved as a coloring material, and a color. It is characterized by being formed in a two-layer laminated structure in which a resin layer in which a pigment is dispersed as a material is laminated.
Alternatively, the frame portion forming layer is, in order from the base material side, a resin layer in which a dye is dissolved as a color material, a resin layer in which a dye is dissolved and a pigment is dispersed, and a pigment as a color material. It is characterized by being formed by laminating the resin layers.
Here, the resin layer in which the dye is dissolved as the coloring material is a resin layer in which the dye is mainly dissolved in the coloring material, and the frame portion is sunlight like the coloring material only in the coloring material. It is a resin layer that can prevent it from appearing whitish under the influence of light under fluorescent lamps, and a resin layer in which a pigment is dispersed as a color material is mainly a pigment dispersed as a color material It is a resin layer.
Further, here, when used in a display device, an area that becomes a display area is a display area, and an area that is not a display area is a non-display area.
The display device referred to here is also simply referred to as a display unit.

  The display device of the present invention is characterized in that a display unit is formed using any of the color filter forming substrates described above, and the display unit is an in-cell touch panel type display unit. It is characterized by this.

(Function)
By adopting such a configuration, the color filter forming substrate of the present invention has a transparent substrate as a base material on one side without using a cover glass, and a colored layer for each color filter is arranged in a display region. In addition, in order to form a non-display area over the entire periphery of the display area, a color filter forming substrate provided with a light-shielding black frame is used, and the base material side is the outermost side (observer side) In a display device in which a non-display area is formed by placing the frame on a bright area under sunlight or a fluorescent lamp, the frame portion appears whitish under the influence of sunlight or the light of the fluorescent lamp. Therefore, it is possible to provide a color filter forming substrate that can eliminate the problem that the product does not have a high-class feeling.
In particular, it is effective for display devices that are used indoors and outdoors, such as mobile electronic device display devices, and that require high quality and design.
Specifically, the frame portion forming layer that forms the frame portion has a resin layer in which a dye is dissolved as a coloring material on the side in contact with the base material, so that the diffuse reflection when the frame portion is viewed from the observer side. The effect can be reduced compared to the case of using a resin material in which a pigment is dispersed as a conventional color material, and this makes the frame look whitish due to the influence of sunlight, particularly outdoors. This makes it possible to eliminate the problem of not having a sense of quality.
The effect of diffuse reflection when the frame portion is viewed from the observer side is that the larger the color material dispersed in the resin material amount, the greater the color material content, and the more the color material is based. The closer to the material, the larger, but when the dye is dissolved as a color material, the dye is dissolved, so the influence of diffuse reflection is much smaller than when the conventional pigment is dispersed. Can be a thing.
Specifically, the frame portion forming layer has a resin layer in which a dye is dissolved as a color material as a side in contact with the substrate, a resin layer in which the dye is dissolved as the color material, and a pigment as a color material. More specifically, the frame portion forming layer includes a resin layer in which a dye is dissolved as a color material, and a resin layer in which a pigment is dispersed as a color material. The form of the invention of claim 3 or the frame portion forming layer is formed of a resin layer in which a dye is dissolved as a color material, and a dye as a color material. And a resin layer in which the pigment is dispersed and a resin layer in which the pigment is dispersed as the color material are laminated.
When the frame portion forming layer is a single resin layer in which a dye is dissolved as a coloring material, it is difficult to increase the optical density (hereinafter also referred to as OD value), and the OD value required for a display device (Normally 4.0 or more) is difficult, and if the OD value is obtained by increasing the film thickness, the plate-making property is deteriorated.
For this reason, in order to obtain an OD value of 4.0 or more required in the case of a display device, a resin layer in which a pigment is dispersed is laminated as a color material capable of increasing the OD value.
According to the third aspect of the invention and the fourth aspect of the invention, the formation of the frame portion forming layer is not complicated and can be said to be practically practical.

In addition, when a display device is formed using a color filter forming substrate formed of a resin layer in which only a pigment is dispersed with the frame portion as a color material, as described below, external light (observation) on the frame portion (Difference reflection of light from the person side) occurs at the interface between the transparent substrate (glass) where the refractive index difference occurs and the light-shielding resin layer, so it is a resin layer in which only the pigment is dispersed using the frame as a color material In the case of the formed form, in order to suppress the influence of diffuse reflected light, the pigment particles (also called pigment) having a large refractive index difference from the transparent substrate (glass) are not brought close to the interface, and pigment particles having a large curvature radius are not allowed. It must be kept away from the interface.
Based on this, the structure of the present invention is formed in which the frame portion is formed with the resin layer in which the dye is dissolved as the base material side.
For example, when the large-diameter particle 12B3 is in contact with the interface 11S as shown in FIG. 6C and the small-diameter particle 12B1 is in contact with the interface 11S as shown in FIG. The diffuse reflection of the particle 12B3 at the interface shown in c) is larger than the diffuse reflection of the particle 12B1 at the interface shown in FIG.
In addition, when a particle 12B1 having a small diameter is in contact with the interface as shown in FIG. 6 (a), and in contact with the interface with the resin film 12C coated on the particle 12B2 as shown in FIG. 6 (b), The diffuse reflection of the particle 12B1 at the interface shown in FIG. 6A is larger than the diffuse reflection when the particle 12B2 shown in FIG. 6B is in contact with the interface in the state where the resin film 12C is coated.
As described above, in the case of the form formed by the resin layer in which the frame portion is a color material and the pigment is dispersed, the smaller the particle size (average particle size) of the pigment particles, the smaller the concentration of the pigment particles, Diffuse reflection from the frame portion viewed from the outside of the material (observer side) becomes small, and diffuse reflection can be reduced by applying resin coating to the pigment particles.
When the transparent substrate is a glass substrate, the refractive index is about 1.4, and the refractive index of the resin used for the color filter is about 1.4 to 1.5.
In addition, since carbon black usually used as a black pigment has a large value of the imaginary term of the complex refractive index, light is mainly reflected on the surface.

Furthermore, as shown in FIG. 7A, the light-shielding frame portion is obtained from the spectral characteristics of the reflectance obtained by measuring the reflected light of the perpendicular incident light from the transparent substrate surface side with the microspectrophotometer. The brightness Y in the XYZ color system of JIS Z8701 is 3.50 or less. As shown in FIG. 7B, the light-shielding frame portion is diffusely reflected by a spectrocolorimeter from the transparent substrate surface side. When the brightness Y in the XYZ color system obtained from the spectral characteristics of the reflectance obtained by measuring with a measurement method (also referred to as the SCE method) that can detect the light is 0.03 or less, Black tightening of the frame layer is good and preferable.
Here, the spectral characteristic of the reflectance obtained by measuring the light-shielding frame portion from the glass surface side by a measuring method capable of detecting diffuse reflected light with a spectrocolorimeter is the light-shielding frame portion of the glass. From the surface side, it is a measurement method that can detect diffuse reflection components with a spectrocolorimeter, it is a spectral characteristic of reflectance obtained by measuring diffuse reflected light, and a measurement method that can detect diffuse reflection components is This is a measurement method in which specular reflection light is removed for measurement, and is generally called an SCE method (abbreviation of Special Components Exclude method) or a diffuse reflection measurement method.
As shown in FIG. 7B, the measurement by the SCE method (diffuse reflection measurement method) is performed by removing the specularly reflected light. Therefore, even in the same color, the measurement value differs depending on the surface state of the sample, and the state of visual evaluation A measurement result close to can be obtained.
In addition, the spectrocolorimeter also has a measurement method that can detect the sum of specular reflection light and diffuse reflection light, and is generally called an SCI method (abbreviation of Special Components Include method). For example, in FIG. In this measurement method, the trap 64 is not provided.
The SCI method is widely used when measuring an object color.
In FIG. 7B, the solid line arrow indicates the incident light 62L from the light source 62, the dotted line arrow indicates the direction of light from each point, and the thin line solid arrow indicates the detection incident on the detector 63. The light 63L is shown.

Further, from the standpoint of ensuring insulation, the surface resistance value of the light-shielding frame is preferably 1 × 10 ¹¹ [Ω / cm ² □] or more.

  The display device of the present invention has such a configuration, and without using a cover glass, a transparent substrate is used as a base material on one side thereof, and a colored layer of each color for a color filter is arranged in a display region, In addition, in order to form a non-display area over the entire periphery of the display area, a color filter forming substrate provided with a light-shielding black frame portion is used, and the base material side is the outermost (observer side). In a display device, such as a mobile electronic device, which is arranged to form a non-display area, the frame portion is affected by sunlight or fluorescent light under a bright place under sunlight or fluorescent light. May appear whitish, which makes it possible to provide a display device that can solve the problem that the product is not high-quality.

  In this way, the present invention is such that, without using a cover glass, a transparent substrate is used as a base material and a colored layer of each color for color filters is arranged on the display area on the one side, and the periphery of the display area In order to form a non-display area over the entire circumference, a color filter forming substrate with a light-shielding black frame portion is used, and the base material side is arranged on the outermost side (observer side) to provide a non-display area. In a display device such as a mobile electronic device to be formed, there is a problem that the frame portion looks whitish under the influence of sunlight or fluorescent light under a bright place under sunlight or fluorescent light. It is possible to provide a display device that can be eliminated, and it is possible to provide a color filter forming substrate capable of manufacturing such a display device.

FIG. 1A is a plan view of a first example of an embodiment of a color filter forming substrate according to the present invention. FIGS. 1B and 1C are respectively A1-A2 and A3-A4. FIG. 1D is an enlarged view of a portion A5 in FIG. 1A, and FIG. 1E is an enlarged view of a portion A6 in FIG. 2A is a plan view of a second example of the embodiment of the color filter forming substrate of the present invention. FIGS. 2B and 2C are respectively B1-B2 and B3-B4. FIG. 2D is an enlarged view of the portion B5 in FIG. 2A, and FIG. 2E is an enlarged view of the portion B6 in FIG. It is the schematic which looked at the color filter formation board | substrate 10 of this invention shown in FIG. 1 from the A7 side of FIG. 1 (a), and is the figure which showed each part lightly and darkly. FIG. 6 is a schematic cross-sectional view showing a manufacturing process of the color filter forming substrate 10 of the first example shown in FIG. 1. FIG. 5 is a schematic cross-sectional view showing a manufacturing process of a color filter forming substrate 10A of the second example shown in FIG. FIG. 6A to FIG. 6C are diagrams for explaining the relationship between the pigment dispersed in the resin, the reflected light at the interface between the transparent substrate (glass substrate) and the resin layer. FIG. 7A is a schematic diagram for explaining how to perform the measurement using the microspectrophotometer, and FIG. 7B illustrates how to perform the measurement using the SCE method capable of detecting the diffuse reflection component by the spectrocolorimeter. FIG. FIG. 8A is a cross-sectional configuration diagram illustrating the positional relationship of each part of a mobile electronic device that is not a touch panel type without using a cover glass, and FIG. 8B uses a cover glass. FIG. 3 is a cross-sectional configuration diagram illustrating the positional relationship of each part of a mobile electronic device that is not a touch panel type in an easy-to-understand manner. FIG. 9A is a cross-sectional configuration diagram illustrating the positional relationship of each part of a mobile electronic device that is a touch panel type without using a cover glass in an easy-to-understand manner, and FIG. 9B uses a cover glass. FIG. 3 is a cross-sectional configuration diagram showing the positional relationship of each part of a mobile electronic device that is a touch panel type in a simplified and easy-to-understand manner. FIG. 10A is a plan view of the color filter forming substrate shown in FIGS. 8A and 9A, and FIGS. 10B and 10C are respectively the views of FIG. 10A. FIG. 10 (d) is an enlarged view of a portion E5 in FIG. 10 (a), as viewed in the direction of the arrows in E1-E2 and E3-E4.

First, the 1st example of embodiment of the color filter formation board | substrate of this invention is demonstrated based on FIG.
The color filter forming substrate 10 of the first example is a color filter forming substrate used in a liquid crystal display device of a mobile electronic device such as a mobile notebook computer or a multifunction terminal device (also referred to as a high function terminal device). As shown in 1 (a), a transparent substrate made of a glass substrate is used as a base material 11, and on one surface side of the base material 11, a colored layer (13R, 13G, 13B) for each color filter is provided in the display region 13S. And a black matrix 13BM coloring layer, and a light-shielding frame portion 12 is provided outside the display region 13S as a non-display region, as shown in FIGS. 1 (b) and 1 (c). As shown, a protective layer (also referred to as an overcoat layer or an OC layer) is provided in a flat shape so as to cover the colored layer 13 and the frame portion 12 of the display region 13S.
In the first example, the layer forming the frame portion 12 (hereinafter also referred to as the frame portion forming layer) is a resin layer 12a in which a dye is dissolved as a coloring material on the side in contact with the substrate 11, and the resin layer 12a and a resin layer 12b in which a pigment is dispersed as a coloring material are formed in a two-layer laminated structure, and the colored layer for the black matrix 13BM is also made up of two layers having the same layer structure as the frame portion 12 in production. It is formed with a laminated structure.
With this two-layer structure, an optical density of 4.0 or more is obtained.
And it is used for the display apparatus of the mobile electronic device of the form shown to Fig.8 (a) or the form shown to Fig.9 (a) by making a base material side into the outermost side (observer side).
When the color filter forming substrate 10 of the first example shown in FIG. 1 is viewed from the A7 side of FIG. 1 (a), the light and dark looks roughly as shown in FIG. 3, but the form shown in FIG. Alternatively, the display device of the mobile electronic device having the configuration shown in FIG.

In particular, in the first example, the frame portion forming layer that forms the frame portion 12 is a resin layer 12a in which a dye is dissolved as a color material on the side in contact with the base material 11, and the resin layer 12a and the color material as a color material. Forming a color filter in which a frame portion is formed by a single resin layer in which a pigment is dispersed as a conventional color material by forming the resin layer 12b in which the pigment is dispersed in a laminated two-layer structure. When a substrate is used for a display device, the provision of a color filter forming substrate that can solve the problem that the frame portion looks whitish under the influence of sunlight and the product is not high-quality is provided. It is possible.
Like a display device for mobile electronic devices, it is used indoors and outdoors, and is particularly effective for a display device that requires high quality and design.

In this example, the type and amount of the dye in the resin layer 12a in which the dye is dissolved as a coloring material are appropriately selected, and the light-shielding frame 12 is measured by microspectrophotometry from the surface of the base material 11 made of a transparent substrate (glass). The brightness Y in the XYZ color system of JIS Z8701 determined from the spectral characteristics of reflectance obtained by measuring the reflected light of vertically incident light with the apparatus is 3.50 or less, and the light-shielding frame portion is When the brightness Y in the XYZ color system obtained from the spectral characteristics of reflectance obtained by measuring with the SCE method capable of detecting diffuse reflection components with a spectrocolorimeter from the glass surface side is 0.03 or less. Can be used to enhance the blackness of the light-shielding frame that is formed as a non-display area on the outside of the display area and around the entire periphery, both indoors and outdoors, even under indoor light and solar light sources. Can have .
Note that the measurement using the microspectrophotometer is performed using, for example, OSP-SP2000 (manufactured by OLYMPUS Co., Ltd.) as the microspectrophotometer, and reflected in the wavelength range of 380 nm to 780 nm as shown in FIG. Measure the rate.
In addition, the measurement of the SCE method is performed by using, for example, CM-2500d manufactured by Konica Minolta Co., Ltd. as a spectrocolorimeter, as shown in FIG. 7B, in the wavelength range of 320 nm to 740 nm. Measure.
This is based on an optical system of d / 8 ° (d is diffused light) as expressed in JIS Z 8722 (irradiation angle / light reception angle), and the angle θ in FIG. 7B is 8 ° here. However, other optical systems may be used.
Based on the results obtained by these measurements, the chromaticity coordinates (x, y) and brightness Y in the XYZ color system of JIS Z8701 measured using a C light source are expressed as chromaticity coordinates. Since (x, y) is almost the same as long as it is a black light-shielding resin layer, brightness Y is used as a parameter.

Here, when used in a display device, an area that becomes a display area is a display area 13S, which means an area inside the frame portion 12 in FIG.
Further, a region of the frame portion 12 that does not become a display region is set as a non-display region.
The colored layer 13 is a generic term for the colored layers 13R, 13G, and 13B for each color filter and the colored layer for the black matrix 13BM.
Further, as shown in FIG. 1 (e), the display area is arranged in a predetermined arrangement so as to be separated by the colored layers 13R, 13G, 13B for forming the color filters and the colored layers for forming the black matrix 13BM. Is formed.
The opening pattern shape of the black matrix and the arrangement of the colored layers of each color are not limited to the form shown in FIG.
There are also examples in which the black matrix opening pattern shape is a stripe shape, a square shape, a delta arrangement, or the like, and the arrangement of the colored layers is changed.

Next, the material of each part will be described.
<Substrate 11>
As the base material 11 made of a transparent substrate used in the first example, those conventionally used for color filter forming substrates can be used, such as quartz glass, Pyrex (registered trademark) glass, synthetic quartz plate, etc. Examples thereof include a transparent inorganic substrate having no flexibility, and a transparent resin substrate having flexibility such as a transparent resin film and an optical resin plate. In particular, an inorganic substrate is preferably used, and an inorganic substrate is preferably used. Of the substrates, a glass substrate is preferably used.
Furthermore, it is preferable to use an alkali-free type glass substrate among the glass substrates.
Alkali-free glass substrates are excellent in dimensional stability and workability in high-temperature heat treatment, and do not contain alkali components in the glass, making them suitable for color filter forming substrates for color liquid crystal display devices using the active matrix method. It is because it can be used for.
As the substrate, a transparent transparent substrate is usually used.

<Colored layer 12 and black matrix 13BM>
In the first example, both the layer forming the frame portion 12 (frame portion forming layer) and the colored layer forming the black matrix 13BM are resins in which a dye is dissolved using the side in contact with the base material 11 as a coloring material. The resin layer 12a is formed as a layer 12a, and the resin layer 12b in which a pigment is dispersed as a color material is laminated. The resin layer 12a in which a dye is dissolved as a color material is formed. Uses a resin material in which only a dye is dissolved in a photosensitive resin as a coloring material, and the resin layer 12b in which a pigment is dispersed as a coloring material is formed by uniformly dispersing only the pigment as a coloring material in the photosensitive resin. A resin material is used.
In addition, the resin layer in which only the dye on the substrate 11 side is dissolved is not necessarily black, and may be a single color other than black.
The preferred color other than black is blue, which has a relatively high optical density.
As the type of dye, a known type may be used.
As the black pigment, carbon black, titanium particles, and the like are usually used. From the refractive index and the particle size, an easily available carbon black having a diameter of about 20 to 100 nm is preferably used, and more preferably 50 nm in diameter. The following are used:
Other pigment systems include acetylene black (C.I. 77266), lamp black (C.I. 77266), bone black (C.I. 77267), graphite (C.I. 77265), iron black ( CI 77774), aniline black (CI 50440), cyanine black and the like.
The black dye as the coloring material may be anything as long as it is a black coloring dye when used in the same manner as the pigment.
When used by dissolving in a water-soluble photosensitive resin, a direct dye is used. I. DirectBlack 17 (C.I. 27700), C.I. I. DirectBlack 19 (C.I. 35255), C.I. I. DirectBlack 22 (C.I. 35435), C.I. I. DirectBlack 32 (C.I. 35440), C.I. I. DirectBlack 38 (C.I. 30235), C.I. I. DirectBlack (C.I. 27720), C.I. I. DirectBlack 56 (C.I. 34170), C.I. I. DirectBlack 71 (C.I. 25040), C.I. I. DirectBlack74 (C.I. 34180), C.I. I. DirectBlack75 (C.I. 35870), C.I. I. Direct Black 77 (C.I. 35860) and the like are available.
Oil-based photosensitive resins include oil-soluble dyes, specifically C.I. I. Solvent Black 3 (C.I. 26150), C.I. I. Solvent Black 5 (C.I. 50415), C.I. I. Solvent Black 7 (C.I. 50415), C.I. I. Acid Black 123 (Solvent Black) (C.I. 12195) or the like is used.
These coloring materials need to be carefully selected in order to maintain the presence or absence of reaction with the photosensitive resin, sufficient sensitivity and resolution, adhesion to the substrate, and coating properties.
Moreover, these color materials do not need to be single and black, and can be obtained by, for example, a mixed color with red, blue and green materials.
Here, the photolithography method is used to form the light-shielding colored layer of the frame portion 12 and the black matrix 13BM. In this case, examples of the binder resin include acrylate-based, methacrylate-based, polyvinyl cinnamate-based, Alternatively, a photosensitive resin having a reactive vinyl group such as a cyclized rubber is used.
In this case, a photopolymerization initiator may be added to the photosensitive resin composition for forming the frame portion and the black matrix containing the coloring material and the photosensitive resin, and further, a sensitizer and a coating as necessary. A property improver, a development improver, a crosslinking agent, a polymerization inhibitor, a plasticizer, a flame retardant and the like may be added.

<Colored layers 13R, 13G, 13B>
In this example, the colored layers for forming the color filters are the three colored layers of the red colored layer 13R, the green colored layer 13G, and the blue colored layer 13B.
The colored layer of each color is obtained by dispersing or dissolving a colorant such as a pigment or dye of each color in a photosensitive resin, and is formed by a photolithography method (also referred to as a photolithography method).
As the binder resin used in the colored layer, for example, a photosensitive resin having a reactive vinyl group such as acrylate, methacrylate, polyvinyl cinnamate, or cyclized rubber is used.
In this case, a photopolymerization initiator may be added to the photosensitive resin composition for forming a colored part containing a colorant and a photosensitive resin, and further, a sensitizer, a coating property improver, and a development as necessary. You may add an improving agent, a crosslinking agent, a polymerization inhibitor, a plasticizer, a flame retardant, etc.
The thickness of the colored layer of each color is usually set to about 1 μm to 5 μm.
The color of the colored layer is not particularly limited as long as it includes at least three colors of red, green, and blue. For example, three colors of red, green, and blue, or red, green, blue, and yellow Or five colors such as red, green, blue, yellow, and cyan.
Examples of the colorant used in the red (also referred to as R) colored layer include perylene pigments, lake pigments, azo pigments, quinacridone pigments, anthraquinone pigments, anthracene pigments, and isoindoline pigments. Can be mentioned.
These pigments may be used alone or in combination of two or more.
Examples of the colorant used in the green (also referred to as G) colored layer include phthalocyanine pigments such as halogen polysubstituted phthalocyanine pigments or halogen polysubstituted copper phthalocyanine pigments, triphenylmethane basic dyes, and isoindoline pigments. Examples thereof include pigments and isoindolinone pigments.
These pigments or dyes may be used alone or in combination of two or more.
Examples of the colorant used in the blue (also referred to as B) coloring layer include copper phthalocyanine pigments, anthraquinone pigments, indanthrene pigments, indophenol pigments, cyanine pigments, dioxazine pigments, and the like. .
These pigments may be used alone or in combination of two or more.

<Protective layer 14>
Examples of the material for the protective layer include a thermosetting resin composition and a photocurable resin composition.
The photo-curable resin composition is preferable for cutting into pieces after imposing the color filter-formed substrate on the surface.
The photo-curable resin composition for the protective layer is the same as the binder resin used for the colored layers for forming the color filters, for example, acrylate-based, methacrylate-based, polyvinyl cinnamate-based, or cyclized A photosensitive resin having a reactive vinyl group such as rubber is used.
In this case as well, a photopolymerization initiator may be added to the photosensitive resin composition for forming colored portions containing the photosensitive resin, and further, a sensitizer, a coating property improver, and a development improver as necessary. Further, a crosslinking agent, a polymerization inhibitor, a plasticizer, a flame retardant and the like may be added.
In the first example, the color filter forming substrate is impositioned to form the respective colored layers 13R, 13G, 13B, the black matrix 13BM, and the frame portion 12, and then the resin composition is applied by a spin coating method. In addition, a protective layer cut is provided between the color filter substrates, and the resin composition for the protective layer is applied as a photocurable resin composition and then dried after being separated into individual pieces at the cut. Although only a predetermined region is selectively irradiated with light and developed, the method for forming the protective layer is not limited to this.
Examples of the thermosetting resin composition for the protective layer include those using an epoxy compound and those using a thermal radical generator.
Examples of the epoxy compound include known polyvalent epoxy compounds that can be cured by a carboxylic acid or an amine compound. Examples of such an epoxy compound include “Epoxy resin handbook” edited by Masaki Shinbo, published by Nikkan Kogyo Shimbun. (1987) and the like, and these can be used.
The thermal radical generator is at least one selected from the group consisting of persulfates, halogens such as iodine, azo compounds, and organic peroxides, more preferably azo compounds or organic peroxides.
Examples of the azo compound include 1,1′-azobis (cyclohexane-1-carbonitrile, 1-[(1-cyano-1-methylethyl) azo] formamide, 2,2′-azobis- [N- (2-propenyl). ) -2-methylpropionamide], 2,2′-azobis (N-butyl-2-methylpropionamide), 2,2′-azobis (N-cyclohexyl-2-methylpropionamide) and the like, Examples of the organic peroxide include di (4-methylzenzoyl) peroxide, t-butylperoxy-2-ethylexanate, 1,1-di (t-hexylperoxy) cyclohexane, 1,1-di ( t-butylperoxy) cyclohexane, t-butylperoxybenzoate, t-butylperoxy-2-ethylhexyl monocarbonate, t-butyl Examples include til-4,4-di- (t-butylperoxy) butanate and dicumyl peroxide.

In the production of the color filter forming substrate 10 of the first example, first, the black matrix 13BM and the frame portion 12 are formed on one surface of the base material 11 as a transparent substrate by the photolithography method, and then each has a predetermined photosensitivity. A colored layer for forming a color filter of each color is sequentially formed by a photolithography method using a curable resin, and the protective layer 14 is formed as described above.
Here, a method of forming the black matrix 13BM and the frame portion 12 by the photolithography method will be briefly described with reference to FIG.
First, a photosensitive and curable resin material 12a1 for forming the resin layer 12a is applied to one surface of the substrate 11, and a drying process (first drying process) is performed. (FIGS. 4A to 4C)
After the first drying process, selective exposure is performed in accordance with the shapes of the black matrix 13BM and the frame portion 12 formation region, development and curing are performed, and the black matrix 13BM and the resin layer 12a of the frame portion 12 are formed. (Fig. 4 (d))
The selective exposure here is usually performed using a photomask.
Next, the resin layer 12a is covered, and a photosensitive and curable resin material 12b1 for forming the resin layer 12b is applied to the entire surface, and a drying process (second drying process) is performed. (FIG. 4 (e), FIG. 4 (f)) After the second drying process, selective exposure is performed according to the shape of the black matrix 13BM and the frame portion 12 formation region, development, curing, and black matrix 13BM. The resin layer 12b of the frame portion 12 is formed. (Fig. 4 (g))
The selective exposure here is performed by exposing from the film surface side using a photomask.
In this way, the black matrix 13BM and the frame portion 12 in the color filter forming substrate 10 of the first example are formed.

Next, the 2nd example of embodiment of the color filter formation board | substrate of this invention is given.
In the second example, in the first example, the layer forming the frame portion 12 (frame portion forming layer) and the layer forming the black matrix 13BM are dissolved in order from the base material 11 side as a coloring material. A resin layer 12a, a resin layer 12c in which a dye and a pigment are dispersed as a color material, and a resin layer 12b in which a pigment is dispersed as a color material are laminated to form.
With this laminated structure, an optical density of 4.0 or more is obtained.
Except for the layer structure of the frame portion 12 and the layer that forms the black matrix 13BM, the second embodiment is the same as the first example, and the color filter forming substrate 10A of the second example shown in FIG. When viewed, the light and dark look roughly as shown in FIG.
Also in the second example, as in the first example, a resin layer 12a in which a dye is dissolved as a coloring material is disposed on the base 11 side, and a pigment is dispersed as a conventional coloring material. When a color filter forming substrate with a single layer forming a frame portion is used for a display device, the frame portion looks whitish under the influence of sunlight outdoors, and the product is not high-quality. It is possible to provide a color filter forming substrate that can eliminate the above.
Each part in the second example is basically the same as in the first example.
In the second example, the resin layer 12c in which the dye is dissolved as a coloring material and the pigment is dispersed in the layer (frame portion forming layer) that forms the frame portion 12 and the layer that forms the black matrix 13BM. A layer in which the dye of the material forming the resin layer 12a and the pigment of the material forming the resin layer 12b are diffused to mix the dye and the pigment, and the mixed state differs depending on the position in the thickness direction of the layer.

In the production of the color filter forming substrate 10A of the second example, as in the case of the first example, first, the black matrix 13BM and the frame portion 12 are formed on one surface of the base material 11 as a transparent substrate by the photolithography method. Subsequently, using each of predetermined photosensitive and curable resins, a colored layer for forming a color filter of each color is sequentially formed by a photolithography method, and further, the protective layer 14 is formed as described above. .
Here, a method of forming the black matrix 13BM and the frame portion 12 by the photolithography method will be briefly described with reference to FIG.
First, a photosensitive and curable resin material 12a1 for forming the resin layer 12a and the resin layer 12b is applied to one surface of the base material 11, followed by a drying process, followed by applying a coating 12b1. (FIGS. 5A to 5C)
After the drying process, selective exposure is performed in accordance with the shapes of the black matrix 13BM and the frame portion 12 formation region, and development and curing are performed to form the black matrix 13BM and the resin layers 12a, 12c, and 12b of the frame portion 12. (Fig. 5 (d))
The selective exposure here is usually performed using a photomask.
5B to 5D, in order from the substrate 11 side, a resin layer 12a in which a dye is dissolved as a color material, a resin layer 12c in which a dye and a pigment are dispersed as a color material, It is formed by laminating a resin layer 12b in which a pigment is dispersed as a color material.
In this way, the black matrix 13BM and the frame portion 12 in the color filter forming substrate 10 of the second example are formed.

The color filter forming substrate of the present invention is not limited to the above form.
For example, in each example of the first example and the second example, the black matrix 13BM is replaced with a resin layer in which a pigment is dispersed as a color material, and the others have the same form as the examples. Also mentioned.
In this case, as the light-shielding colored layer for forming the black matrix 13BM, for example, a carbon black coated with a resin such as carbon black or an epoxy resin as a coloring material is dispersed in a binder resin. Yes.
In addition, what disperse | distributed carbon black as a pigment in binder resin can form a light-shielding resin layer by making film thickness comparatively thin.
The film thickness is such that an optical density of 4.0 or higher is obtained.
In this case as well, the light-shielding colored layer for forming the black matrix 13BM is formed by photolithography. In this case, examples of the binder resin include acrylate-based, methacrylate-based, polyvinyl cinnamate-based, or ring A photosensitive resin having a reactive vinyl group such as a synthetic rubber is used.
In this case, a photopolymerization initiator may be added to the photosensitive resin composition for forming a black matrix containing a black colorant and a photosensitive resin, and further, if necessary, a sensitizer, a coatability improver, A development improver, a crosslinking agent, a polymerization inhibitor, a plasticizer, a flame retardant, and the like may be added.
The black matrix may be formed using a printing method or an ink jet method. In this case, examples of the binder resin include polymethyl methacrylate resin, polyacrylate resin, polycarbonate resin, polyvinyl alcohol resin, polyvinyl alcohol. Examples include pyrrolidone resin, hydroxyethyl cellulose resin, carboxymethyl cellulose resin, polyvinyl chloride resin, melamine resin, phenol resin, alkyd resin, epoxy resin, polyurethane resin, polyester resin, maleic acid resin, polyamide resin and the like.
In this way, the black matrix 13BM is formed.
The frame portion 12 is formed in the same manner as in the first example or the second example. In this embodiment, the black matrix 13BM is formed separately from the frame portion. The other steps are basically performed in the same manner as in the first example or the second example.

The color filter forming substrate of the present invention is not limited to the first example and the second example.
For example, in the first example, the black matrix is formed of one resin layer in which a pigment is dispersed, and the frame portion is the same as in the first example, in which a resin layer in which a dye is dissolved and a resin layer in which a pigment is dispersed are 2 layers. You may form with the structure which laminated | stacked the layer.
In the first and second examples, the pigment is dispersed in the resin layer in which the dye is dissolved as the color material, or the dye is dissolved in the resin layer in which the pigment is dispersed as the color material. Also mentioned.
Further, in each of the first example and the second example, the display area on the protective layer 14 may further include a plurality of spacers having a predetermined height.
The liquid crystal display device includes a color filter forming substrate in which a black matrix layer made of a light-shielding colored layer and a colored layer of each color are disposed on one surface of a transparent substrate, and a counter electrode substrate (also referred to as a TFT substrate). Are arranged facing each other with a predetermined gap, and the liquid crystal is sealed in the gap, and the light transmittance of the pixels of the colored layer of each color is electrically controlled by controlling the orientation of the liquid crystal. In order to control the color filter forming substrate and the counter electrode substrate (also referred to as TFT substrate) to a predetermined gap, a plurality of spacers having a predetermined height are arranged on the protective layer 14 of the color filter forming substrate.
In the first example and the second example, the display device is a liquid crystal display device, but the present invention is not limited to this.
For example, a mode in which the display device is an organic EL display device is also included.
Further, in the first example and the second example, a quadrangular shape is used. However, in some cases, a corner portion may be rounded.
In addition, the color filter forming substrate of the first example and the second example is used to form a color filter used in a display device of a mobile electronic device such as a mobile notebook computer or a multi-function terminal device (also referred to as a high-function terminal device). Although it is a board | substrate, a use is not limited to these.
The present invention can also be applied to a display device such as a TV used under a bright place under sunlight or a fluorescent lamp.

[Example]
The present invention will be further described with reference to examples.
Example 1
Example 1 was prepared by preparing the first embodiment example shown in FIG. 1 by the manufacturing method shown in FIG. 4, and preparing and preparing a photocurable curable resin composition A as follows. Then, using the produced curable resin composition A, a red curable resin composition for forming a color filter, a green curable resin composition, a blue curable resin composition, a black matrix, and a curing for forming a frame portion. A curable resin composition is prepared, and using these, each curable resin composition is subjected to a photolithography method to form each colored layer for a color filter, a black matrix, and a colored layer for forming a frame portion.
Here, after forming a black matrix and a light-shielding colored layer for the frame portion, a red colored layer 13R, a green colored layer 13G, and a blue colored layer 13B for the color filter in the display region 13S are respectively formed into photolithography. It is formed in the process.
The resin layer 12a in which the dye is dissolved may be a single color dye other than black, and here, a curable resin composition in which a blue dye is dissolved is used.

(Preparation of curable resin composition A)
The polymerization tank is charged with 63 parts by weight of methyl methacrylate (MMA), 12 parts by weight of acrylic acid (AA), 6 parts by weight of 2-hydroxyethyl methacrylate (HEMA), and 88 parts by weight of diethylene glycol dimethyl ether (DMDG). After stirring and dissolving, 7 parts by weight of 2,2′-azobis (2-methylbutyronitrile) was added and dissolved uniformly.
Then, it stirred at 85 degreeC under nitrogen stream for 2 hours, and also was made to react at 100 degreeC for 1 hour.
7 parts by weight of glycidyl methacrylate (GMA), 0.4 parts by weight of triethylamine, and 0.2 parts by weight of hydroquinone were further added to the resulting solution, and the mixture was stirred at 100 ° C. for 5 hours to obtain a copolymer resin solution ( A solid content of 50%) was obtained.
Next, the following materials were stirred and mixed at room temperature to obtain a curable resin composition.
-Copolymer resin solution (solid content 50%): 16 parts by weight-Dipentaerythritol pentaacrylate (Sartomer SR399)
: 24 parts by weight-Orthocresol novolak type epoxy resin (Epicoat Shell Epoxy Co., Ltd. Epicoat 180S70): 4 parts by weight-2-Methyl-1- (4-methylthiophenyl) -2-morpholinopropan-1-one: 4 parts by weight Parts ・ Diethylene glycol dimethyl ether: 52 parts by weight

(Adjustment of Resin Material 12a1 for Forming Resin Layer 12a for Black Matrix and Frame)) First, a resin composition was prepared by mixing and stirring the following materials at room temperature to dissolve the dye.
-Dye (BasicBlue 7): 2.4 parts by weight-Polymer dispersion (Bic Chemie Japan Co., Ltd. Disperbyk 163): 14.7 parts by weight-Solvent (3-methoxybutyl acetate): 73.5 parts by weight The components of the following amounts were sufficiently mixed to obtain a light-shielding colored layer composition.
-Curable resin composition A: 9.4 parts by weight The above light-shielding colored layer composition is applied on a base material 11 (glass substrate, manufactured by Asahi Glass Co., Ltd., AN material) with a spin coater, and is heated at 100 ° C for 3 minutes. It was dried to form a light-shielding colored layer.
A photomask is placed at a distance of 100 μm from the coating film and the light-shielding colored layer is exposed to a light-shielding pattern with an ultra-high pressure mercury lamp of 2.0 kW by a proximity aligner, and then with a 0.05 wt% potassium hydroxide aqueous solution. After development, the substrate was left to stand in an atmosphere of 170 ° C. for 30 minutes to perform heat treatment to form a light-shielding colored layer in the display region and the frame portion 12 region.
Here, the resin material adjusted as described above was formed on the entire region, and a resin layer 12a in which a dye was dissolved as a coloring material for the black matrix and the frame portion was formed by photolithography.
The formed film thickness after the heat treatment was 1.0 μm.

(Adjustment of the black matrix and the resin material 12b1 for forming the resin layer 12a of the frame portion)
First, the following components were mixed and sufficiently dispersed with a bead mill to prepare a black pigment dispersion.
Resin-coated carbon black (Mitsubishi Chemical Corporation MS18E): 20 parts by weight Polymer dispersion (Bic Chemie Japan, Ltd. Disperbyk 163): 5 parts by weight Solvent (diethylene glycol dimethyl ether): 75 parts by weight The components were sufficiently mixed to obtain a light-shielding colored layer composition.
-Black pigment dispersion: 43 parts by weight-Curable resin composition A: 19 parts by weight-Diethylene glycol dimethyl ether: 38 parts by weight The light-shielding property is applied to the entire surface so as to cover the resin layer 12a in which the formed dye is dispersed. The composition for colored layer was applied with a spin coater and dried at 100 ° C. for 3 minutes to form a light-shielding colored layer.
A photomask is placed at a distance of 100 μm from the coating film and the light-shielding colored layer is exposed to a light-shielding pattern with an ultra-high pressure mercury lamp of 2.0 kW by a proximity aligner, and then with a 0.05 wt% potassium hydroxide aqueous solution. After development, the substrate was left to stand in an atmosphere of 230 ° C. for 30 minutes to perform heat treatment, thereby forming a light-shielding colored layer in the display region and the frame portion 12 region.
Here, the adjusted colored layer was formed on the entire region, and a black matrix and a light-shielding resin layer on the frame portion were formed by photolithography.
The formed film thickness (total film thickness of the resin layer 12a and the resin layer 12b) after the heat treatment was 2.0 μm.
The resin-coated carbon black (MS18E manufactured by Mitsubishi Chemical Corporation) has an average particle size of 25 nm.
The particle size is, for example, a laser Doppler scattered light analysis particle size analyzer (trade name “Microtrac 934UPA”) manufactured by Nikkiso Co., Ltd. The particle diameter in which the cumulative pigment particle diameter of the product occupies 50% is defined as 50% average particle diameter, and the value is measured and determined.

(Formation of red colored layer 13R)
On the black matrix, a red curable resin composition having the following composition was applied by spin coating, and then dried in an oven at 70 ° C. for 3 minutes.
Next, a photomask is placed at a distance of 100 μm from the coating film of the red curable resin composition, and ultraviolet rays are applied only to the region corresponding to the colored layer formation region using a 2.0 kW ultrahigh pressure mercury lamp by a proximity aligner. Irradiated for 10 seconds.
Subsequently, it was immersed in 0.05 wt% potassium hydroxide aqueous solution (liquid temperature 23 degreeC) for 1 minute, and alkali development was carried out, and only the uncured part of the coating film of a red curable resin composition was removed.
Thereafter, the substrate was left in an atmosphere at 230 ° C. for 30 minutes to perform heat treatment, thereby forming a red pixel pattern in the display region 13S.
The formed film thickness was 2.0 μm.
<Composition of red curable resin composition>
C. I. Pigment Red 177: 3 parts by weight C.I. I. Pigment Red 254: 4 parts by weight-Polysulfonic acid type polymer dispersant: 3 parts by weight-Curable resin composition A: 23 parts by weight-3-methoxybutyl acetate: 67 parts by weight

(Formation of green colored layer 13G)
Next, using the green curable resin composition having the following composition, in the same process as the formation of the red relief pattern, the coating film thickness is changed so that the formed film thickness becomes 2.0 μm. A relief pattern composed of a green colored layer was formed in the display area.
<Composition of green curable resin composition>
C. I. Pigment Green 58: 7 parts by weight C.I. I. Pigment Yellow 138: 1 part by weight-Polysulfonic acid type polymer dispersant: 3 parts by weight-Curable resin composition A: 22 parts by weight-3-methoxybutyl acetate: 67 parts by weight

(Formation of blue colored layer 13B)
Furthermore, using the blue curable resin composition having the following composition, in the same process as the formation of the red relief pattern, the coating film thickness is changed so that the formed film thickness becomes 2.0 μm, and the display area is blue. The relief pattern was formed.
<Composition of blue curable resin composition>
C. I. Pigment Blue 15: 6: 5 parts by weight-Polysulfonic acid type polymer dispersant: 3 parts by weight-Curable resin composition A: 25 parts by weight-3-methoxybutyl acetate: 67 parts by weight

(Formation of protective film 14)
On the board | substrate in which the colored layer 13 was formed as mentioned above, the above-mentioned curable resin composition A was apply | coated and dried by the spin coating method, and the coating film of 2 micrometers of dry coating films was formed.
A photomask is placed at a distance of 100 μm from the coating film of the curable resin composition A, and an ultraviolet ray is applied only to the region corresponding to the protective layer formation region using a 2.0 kW ultrahigh pressure mercury lamp by a proximity aligner for 10 seconds. Irradiated.
Subsequently, it was immersed in 0.05 wt% potassium hydroxide aqueous solution (liquid 23 degreeC) for 1 minute, and alkali image development was carried out, and only the uncured part of the coating film of curable resin composition was removed.
Thereafter, the substrate was left to stand in an atmosphere of 230 ° C. for 30 minutes to perform a heat treatment to form a protective film.
Thus, the color filter forming substrate 10 of the first example shown in FIG. 1 was produced.

Next, a spacer having a predetermined height was disposed on the protective layer 14 of the color filter forming substrate 10 of the first example manufactured as described below to manufacture a liquid crystal display device.
(Spacer formation)
On the protective layer 14 of the color filter forming substrate 10 on which the colored layer and the protective layer were formed as described above, the curable resin composition A was applied by a spin coating method and dried to form a coating film.
A photomask was placed at a distance of 100 μm from the coating film of the curable resin composition A, and only a spacer formation region was irradiated with ultraviolet rays for 10 seconds using a 2.0 kW ultrahigh pressure mercury lamp by a proximity aligner.
Subsequently, it was immersed in 0.05 wt% potassium hydroxide aqueous solution (liquid temperature 23 degreeC) for 1 minute, and alkali development was carried out, and only the uncured part of the coating film of the curable resin composition A was removed.
Thereafter, the substrate was left to stand in an atmosphere at 230 ° C. for 30 minutes to perform a heat treatment to form a predetermined number density.
(Creation of liquid crystal display device)
An alignment film (SE-6210, manufactured by Nissan Chemical Industries, Ltd.) was formed on the surface of the color filter forming substrate obtained as described above on the colored layer forming side.
Next, a necessary amount of IPS liquid crystal is dropped on the glass substrate (TFT substrate) on which the TFT is formed, the color filters are overlaid, and a UV curable resin (Three Bond Co., Ltd., Three Bond 3025) is used as a sealing material. A cell was assembled by exposing at a dose of 400 mJ / cm ² while applying a pressure of ³ kgf / cm ² to form a cell, and a polarizing plate, a backlight unit, and a cover were installed to obtain a liquid crystal display device.

(Comparative Example 1)
In Example 1, the colored layer for forming the black matrix and the frame portion is a resin layer 1 in which only a pigment is dispersed as a coloring material.
First, the following components were mixed and sufficiently dispersed with a bead mill to prepare a black pigment dispersion.
-Titanium black (manufactured by Mitsubishi Chemical Corporation): 60 parts by weight-Polymer dispersion (Big Chemie Japan Co., Ltd. Disperbyk 163): 7 parts by weight-Solvent (diethylene glycol dimethyl ether): 33 parts by weight By mixing, a light-shielding composition for a colored layer was obtained.
-Black pigment dispersion: 40 parts by weight-Curable resin composition A: 22 parts by weight-Diethylene glycol dimethyl ether: 38 parts by weight The light-shielding colored layer on the substrate 11 (glass substrate, manufactured by Asahi Glass Co., Ltd., AN material) The composition for coating was applied with a spin coater and dried at 100 ° C. for 3 minutes to form a light-shielding colored layer.
A photomask is placed at a distance of 100 μm from the coating film and the light-shielding colored layer is exposed to a light-shielding pattern with an ultra-high pressure mercury lamp of 2.0 kW by a proximity aligner, and then with a 0.05 wt% potassium hydroxide aqueous solution. After development, the substrate was left to stand in an atmosphere of 230 ° C. for 30 minutes to perform heat treatment, thereby forming a light-shielding colored layer in the black matrix region and the frame region.
Here, a colored layer was formed on the entire region, and a black matrix and a light-shielding resin layer on the frame portion were formed by photolithography.
The formed film thickness after the heat treatment was 1.3 μm.
The pigment titanium has an average particle diameter of 25 nm.
Others were the same as in the example.

(Comparative Example 2)
In Example 1, the colored layer for forming the black matrix and the frame portion is a resin layer in which only a rare carbon black pigment is dispersed as a coloring material.
First, the following components were mixed and sufficiently dispersed with a bead mill to prepare a black pigment dispersion.
Carbon black (R-1060 manufactured by Colombian): 30 parts by weight Polymer dispersion (Bic Chemie Japan, Ltd. Disperbyk 163): 7 parts by weight Solvent (diethylene glycol dimethyl ether): 63 parts by weight Next, components in the following amounts Were sufficiently mixed to obtain a light-shielding composition for a colored layer.
-Black pigment dispersion: 39 parts by weight-Curable resin composition A: 19 parts by weight-Diethylene glycol dimethyl ether: 42 parts by weight The light-shielding colored layer on the substrate 11 (glass substrate, manufactured by Asahi Glass Co., Ltd., AN material) The composition for coating was applied with a spin coater and dried at 100 ° C. for 3 minutes to form a light-shielding colored layer.
A photomask is placed at a distance of 100 μm from the coating film and the light-shielding colored layer is exposed to a light-shielding pattern with an ultra-high pressure mercury lamp of 2.0 kW by a proximity aligner, and then with a 0.05 wt% potassium hydroxide aqueous solution. After development, the substrate was left to stand in an atmosphere of 230 ° C. for 30 minutes to perform heat treatment, thereby forming a light-shielding colored layer in the black matrix region and the frame region.
Here, a colored layer was formed on the entire region, and a black matrix and a light-shielding resin layer on the frame portion were formed by photolithography.
The formed film thickness after the heat treatment was 1.0 μm.
The carbon black has an average particle size of 30 nm.
Others were the same as in the example.

(Comparative Example 3)
In Example 1, the colored layer for forming the black matrix and the frame portion is a single resin layer in which only the resin-coated carbon black, which is a pigment as a coloring material, is dispersed.
First, the following components were mixed and sufficiently dispersed with a bead mill to prepare a black pigment dispersion.
Resin-coated carbon black (Mitsubishi Chemical Corporation MS18E): 20 parts by weight Polymer dispersion (Bic Chemie Japan, Ltd. Disperbyk 163): 5 parts by weight Solvent (diethylene glycol dimethyl ether): 75 parts by weight The components were sufficiently mixed to obtain a light-shielding colored layer composition.
-Black pigment dispersion: 43 parts by weight-Curable resin composition A: 19 parts by weight-Diethylene glycol dimethyl ether: 38 parts by weight The light-shielding colored layer on the substrate 11 (glass substrate, manufactured by Asahi Glass Co., Ltd., AN material) The composition for coating was applied with a spin coater and dried at 100 ° C. for 3 minutes to form a light-shielding colored layer.
A photomask is placed at a distance of 100 μm from the coating film and the light-shielding colored layer is exposed to a light-shielding pattern with an ultra-high pressure mercury lamp of 2.0 kW by a proximity aligner, and then with a 0.05 wt% potassium hydroxide aqueous solution. After development, the substrate was left to stand in an atmosphere of 230 ° C. for 30 minutes to perform heat treatment, thereby forming a light-shielding colored layer in the black matrix region and the frame region.
Here, a colored layer was formed on the entire region, and a black matrix and a light-shielding resin layer on the frame portion were formed by photolithography.
The formed film thickness after the heat treatment was 1.3 μm.
The resin-coated carbon black (MS18E manufactured by Mitsubishi Chemical Corporation) has an average particle size of 25 nm.
Others were the same as in the example.

(Comparative Example 4)
In Example 1, the black matrix and the colored layer for forming the frame portion are one resin layer in which only a dye is dissolved as a coloring material.
First, the following materials were mixed and stirred at room temperature to prepare a resin composition in which a dye was dissolved.
-Dye (BasicBlue 7): 2.4 parts by weight-Polymer dispersion (Big Chemie Japan Co., Ltd. Disperbyk 163): 14.7 parts by weight-Solvent (3-methoxybutyl acetate): 73.5 parts by weight A sufficient amount of components were mixed to obtain a light-shielding composition for a colored layer.
-Curable resin composition A: 9.4 parts by weight The above light-shielding colored layer composition is applied on a base material 11 (glass substrate, manufactured by Asahi Glass Co., Ltd., AN material) with a spin coater, and is heated at 100 ° C for 3 minutes. It was dried to form a light-shielding colored layer.
A photomask is placed at a distance of 100 μm from the coating film and the light-shielding colored layer is exposed to a light-shielding pattern with an ultra-high pressure mercury lamp of 2.0 kW by a proximity aligner, and then with a 0.05 wt% potassium hydroxide aqueous solution. After development, the substrate was left to stand in an atmosphere of 170 ° C. for 30 minutes to perform heat treatment to form a light-shielding colored layer in the display region and the frame portion 12 region.
Here, the resin material adjusted as described above was formed on the entire region, and one resin layer in which only a dye was dissolved as a coloring material was formed as a black matrix and a frame portion by photolithography.
The formed film thickness after the heat treatment was 4.0 μm.

(Comparative Example 5)
Instead of the resin layer in which the dye was dissolved, a protective film A using the curable resin composition A was formed, and a resin layer using resin-coated carbon was formed thereon as in Example 1.

表１に示すように、目視による評価については、基材側に、色材として染料を溶解させた樹脂層を配している、実施例１、比較例４の場合は、良好であったが、基材側に、基材側に、色材として顔料を分散させた樹脂層を配している比較例１〜比較例３の場合、および比較例５の場合は、良好ではなかった。
尚、目視による評価は、人の眼で、白っぽく見える場合を×（不良）とし、白っぽく見えない場合を○（良好）としている。
光学濃度の評価判定は、遮光膜として通常必要とされる光学濃度ＯＤ値４．０以上を○（良好）とし、４．０未満を×（不良）としている。
目視による評価、光学濃度の面から、実施例１のサンプルのみが、判定○（ＯＫ）となった。
また、実施例１のサンプルについては、表１のように、遮光性の額縁部を透明基板面側から顕微分光測光装置にて垂直入射光の反射光を測定した得られた反射率の分光特性から求めたＪＩＳ Ｚ８７０１のＸＹＺ表色系における明るさＹが、３．５０以下、且つ、遮光性の額縁部を透明基板面側から分光測色計により拡散反射光を検出できる測定方式（ＳＣＥ方式とも言う）で測定して得られた反射率の分光特性から求めた前記ＸＹＺ表色系における明るさＹが、０．０３以下となった。
尚、比較例４は青色染料のみ溶解させた樹脂層だけとしているため、参考用で、目視判定は実施しておりません。 The color filter-formed substrates prepared as in Example 1 and Comparative Examples 1 to 5 are referred to as Samples S1 to S6, respectively, and the side opposite to the side on which the frame portion of the base material was formed for each sample. From the surface side, the light was applied from the direction perpendicular to the surface with a projector (TH3-100 manufactured by OLYMPUS Co., Ltd.), and the person observed and evaluated the reflected light at an angle of 45 degrees to the surface. However, the results are shown in Table 1.
Using OSP-SP2000 (manufactured by OLYMPUS Co., Ltd.) as a microspectrophotometer, the measurement of reflectance in the wavelength range of 380 nm to 780 nm and the measurement of the SCE method are made by Konica Minolta Co., Ltd. Measurement of reflectance in the wavelength range of 320 nm to 740 nm using CM-2500d.
<Measurement conditions: microspectrophotometer>
Measuring instrument: OLYMPUS Co., Ltd., microspectrophotometric device Illumination range: circular with a diameter of 60 μm <Measuring condition: spectrophotometer>
Measuring instrument: Konica Minolta Co., Ltd., spectral colorimeter "CM-2500d"
Light reception condition: d / 8 ° (JIS Z8722 condition c)
First irradiation area: circular with measurement diameter = 11 mm diameter Second irradiation area: same measurement diameter as first irradiation area = circular with diameter 11 mm Measurement area: circular with 8 mm in the irradiation area (the center of gravity is the irradiation area, (Same as a circle with a diameter of 11 mm)

As shown in Table 1, in the case of Example 1 and Comparative Example 4 in which the resin layer in which the dye was dissolved as the coloring material was disposed on the base material side, the visual evaluation was good. In the case of Comparative Examples 1 to 3 and Comparative Example 5 in which a resin layer in which a pigment is dispersed as a coloring material is arranged on the base material side, the case of Comparative Example 5 was not good.
In addition, in the visual evaluation, a case where it looks whitish with human eyes is indicated as x (defect), and a case where it does not appear whitish is indicated as ◯ (good).
In the evaluation determination of the optical density, an optical density OD value of 4.0 or more, which is normally required as a light-shielding film, is evaluated as ◯ (good), and less than 4.0 is evaluated as x (defective).
From the viewpoint of visual evaluation and optical density, only the sample of Example 1 was judged to be good (OK).
In addition, as for the sample of Example 1, as shown in Table 1, the spectral characteristics of the reflectance obtained by measuring the reflected light of the normal incident light from the transparent substrate surface side of the light-shielding frame portion with the microspectrophotometer. The brightness Y in the XYZ color system of JIS Z8701 determined from the above is 3.50 or less, and the light-shielding frame portion can be detected from the transparent substrate surface side by a spectrocolorimeter (SCE method) The brightness Y in the XYZ color system obtained from the spectral characteristics of the reflectance obtained by measurement in (5) is 0.03 or less.
In addition, since Comparative Example 4 has only a resin layer in which only a blue dye is dissolved, the visual judgment is not performed for reference.

10 Color filter forming substrate 11 Base material (transparent substrate)
11S Interface 12 Frame portions 12a, 12b, 12c Resin layers 12a1, 1b1 Resin materials 12a2, 12b2 Resin materials 12A1, 12A2, 12A3 Resin layers 12B1, 12B2, 12B3 Rare pigment particle portion 12C Coating 13 Colored layer 13R Red Colored layer (also called R colored layer)
13G green colored layer (also called G colored layer)
13B Blue colored layer (also called B colored layer)
13BM black matrix 13S display area 13A (for measurement) colored layer 14 protective tank (also referred to as overcoat layer or OC layer)
20 Refractive index adjusting oil 30 Black plate 40 Detector 45 Inspection light 61 Integrating sphere 62 Light source 62L Incident light 63 Detector 63L Detection light 64 Trap θ Angle 110 Color filter forming substrate 110a (color filter forming substrate) Frame portion 111 Base material (transparent substrate)
112 Frame portion 113 Colored layer 113R Red colored layer (also called R colored layer)
113G green colored layer (also called G colored layer)
113B Blue colored layer (also called B colored layer)
113S Display area 113BM Black matrix 114 Protection tank (also called overcoat layer or OC layer)
130 cover glass 130a (cover glass) frame part 140 touch panel 150 TFT substrate

Claims (6)

  Using a transparent substrate as a base material, on one surface side of the base material, a colored layer for each color filter is arranged in the display area to form a display area, and a light-shielding frame portion outside the display area A color filter forming substrate used in a display device with the base material side as the outermost side (observer side), and the frame portion forming layer forming the frame portion is a side in contact with the base material. A color filter forming substrate characterized in that a resin layer in which a dye is dissolved as a coloring material is used.   2. The color filter forming substrate according to claim 1, wherein the frame portion forming layer has a resin layer in which a dye is dissolved as a color material as a side in contact with the base material, and a resin layer in which the dye is dissolved as the color material. And a resin layer in which a pigment is dispersed as a coloring material.   3. The color filter forming substrate according to claim 2, wherein the frame portion forming layer is a two-layer laminate in which a resin layer in which a dye is dissolved as a color material and a resin layer in which a pigment is dispersed as a color material are laminated. A color filter forming substrate having a structure.   3. The color filter forming substrate according to claim 2, wherein the frame portion forming layer is a resin layer in which a dye is dissolved as a color material, a dye is dissolved as a color material, and a pigment is dispersed in order from the base material side. A color filter forming substrate, comprising: a laminated resin layer and a resin layer in which a pigment is dispersed as a coloring material.   A display device, wherein a display portion is formed using the color filter forming substrate according to claim 1.   The display device according to claim 5, wherein the display unit is an in-cell touch panel type display unit.

Images